CountOfEqualBitPairs

import java.util.Scanner;

public class _08_CountOfEqualBitPairs {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter number: ");
        int num = sc.nextInt();
        int count = 0;
        int numPreLastDigit;
        int numLastDigit = num & 1;
        num = num >> 1;

        while (num > 0) {
            numPreLastDigit = numLastDigit;
            numLastDigit = num & 1;
            num = num >> 1;

            if (numPreLastDigit == numLastDigit) {
                count++;
            }
        }

        System.out.println("Result: " + count);
    }

}